VEHICLE STABILITY CONTROL SYSTEM TEST MODE PROCEDURE

TEST MODE PROCEDURE (SIGNAL CHECK)

1. Enter Test Mode (when using the intelligent tester).

   
   

   1. Turn the ignition switch off.

   2. Check that the steering wheel is in the straight-ahead position.

   3. for Manual Transmission:

      Check that the shift lever is in neutral and apply the parking brake.

      for Automatic Transmission:

      Check that the shift lever is in P.

   4. Connect the intelligent tester to the DLC3.

   5. Turn the ignition switch to ON.

   6. Turn the intelligent tester on.

   7. Switch the skid control ECU to Test Mode using the intelligent tester. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Signal Check.

   8. Check that the ABS warning light and VSC OFF indicator light blink in the Test Mode pattern (0.125 seconds on and 0.125 seconds off).

2. Enter Test Mode (when using SST check wire).

   
   

   1. Turn the ignition switch off.

   2. Check that the steering wheel is in the straight-ahead position.

   3. for Manual Transmission:

      Check that the shift lever is in neutral and apply the parking brake.

      for Automatic Transmission:

      Check that the shift lever is in P.

   4. 

      Text in Illustration

      *a	Front view of DLC3

      Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

      Note

      Do not connect the incorrect terminals as this will cause damage.

      SST

      09843-18040

   5. Turn the ignition switch to ON.

   6. Check that the ABS warning light and VSC OFF indicator light blink in the Test Mode pattern (0.125 seconds on and 0.125 seconds off).

ABS SIGNAL CHECK

1. Acceleration Sensor Check

   
   

   1. Enter Test Mode.

   2. Keep the vehicle stationary on a level surface for 1 second or more.

      Tech Tips

      The acceleration sensor check can be performed with the master cylinder pressure sensor check below.

2. Lost Booster Pressure Judgment Check and Master Cylinder Pressure Sensor Zero Point Calibration

   Note

   Perform a check in the "lost booster pressure" state (vacuum in the booster is depressurized).

   
   

   1. Enter Test Mode.

   2. Release the parking brake.

   3. Check that the brake warning light comes on when depressing the brake pedal with a force of more than 59 N (6 kgf, 13.2 lbf) for 1 second or more (the "lost booster pressure" state is judged as normal).

   4. Start the engine while depressing the brake pedal with a force of more than 59 N (6 kgf, 13.2 lbf) for 1 second or more.

   5. Check that the brake warning light goes off when quickly releasing the brake pedal (the "lost booster pressure" state is judged as normal).

   6. Leave the vehicle for 1 second or more (master cylinder pressure sensor zero point calibration).

      Note

      
      

      • If the brake pedal is depressed slowly or repeatedly, master cylinder pressure sensor zero point calibration is not performed normally.

      • If the lost booster pressure judgment check results are not normal, the master cylinder pressure sensor check cannot be performed.

      • If rechecking after the engine has started, end Test Mode, enter Test Mode again, and then release vacuum in the booster by pumping the brake pedal prior to rechecking.

3. Master Cylinder Pressure Sensor Check

   
   

   1. Enter Test Mode.

   2. With the vehicle stationary, release the brake pedal for 1 second or more, and then quickly depress and hold the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second.

   3. Check that the ABS warning light stays on for 3 seconds.

      Tech Tips

      
      

      • Make sure that the ABS warning light comes on.

      • While the ABS warning light is on, continue to depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more.

      • The ABS warning light comes on for 3 seconds every time the brake pedal operation above is performed.

      • If the master cylinder pressure sensor check is not completed, depressing the brake pedal causes further decreases in vacuum in the brake booster, making the sensor check difficult to complete.

      • If the vacuum is insufficient, the master cylinder pressure sensor check may not be completed. In this case, run the engine at idle to obtain sufficient vacuum.

      • If the brake pedal is strongly depressed when the vacuum is insufficient, the brake warning light may come on in accordance with booster pressure control. In this case, run the engine at idle to obtain sufficient vacuum.

4. for 4WD:

   H2 to H4 Shift Operation Check

   
   

   1. Enter Test Mode.

   2. Move the transfer shift lever from the H2 position to the H4 position.

      Tech Tips

      Move the vehicle either forward or backward a little to lock the center differential.

   3. Move the transfer shift lever from the H4 position to the H2 position.

5. Speed Sensor Check

   Note

   
   

   • Before performing the speed sensor check, complete the acceleration sensor and master cylinder pressure sensor checks.

   • The speed sensor check may not be completed if the speed sensor check is started while turning the steering wheel or spinning the wheels.

   • After the ABS warning light goes off, if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code is stored again. Decelerate or stop the vehicle before the vehicle speed reaches 80 km/h (50 mph).

   • If the sensor check is not completed, the ABS warning light blinks while driving and the ABS does not operate.

   
   

   1. Enter Test Mode.

   2. Start the engine.

   3. Drive the vehicle straight-ahead. Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds.

   4. Check that the ABS warning light goes off.

      Tech Tips

      
      

      • The sensor check may not be completed if wheelspin occurs.

      • The ABS warning light comes on immediately if a malfunction is detected during the speed sensor check.

   5. Stop the vehicle.

      Tech Tips

      When the speed sensor check is completed, the ABS warning light goes off while driving and blinks in the Test Mode pattern while the vehicle is stationary.

VSC OFF SWITCH CHECK

1. Briefly press the VSC OFF switch.

2. Check that the slip indicator light goes off.

3. Briefly press the VSC OFF switch again to turn the slip indicator light on.

END OF SIGNAL CHECK

1. If the signal check is completed, the ABS warning light and VSC OFF indicator light blink (0.125 seconds on and 0.125 seconds off) when the vehicle stops and the ABS warning light and VSC OFF indicator light are off while the vehicle is being driven.

   Note

   If the signal check has not been completed, the ABS warning light blinks while driving and the ABS does not operate.

READ DTC OF SIGNAL CHECK FUNCTION

1. When using the intelligent tester:

   
   

   1. Read the output DTCs by following the tester screen.

      Note

      
      

      • If only DTCs other than Test Mode (signal check) DTCs are output, repair the malfunctions and clear the DTCs.

      • If Test Mode (signal check) DTCs and other DTCs are output or if only Test Mode (signal check) DTCs are output, repair the malfunctions, clear the DTCs and Test Mode (signal check) DTCs, and perform the Test Mode (signal check) inspection again.

      Tech Tips

      Refer to List of Test Mode (Signal Check) DTC.

   2. Turn the ignition switch off and disconnect the intelligent tester.

2. When using SST check wire:

   Note

   When terminals 12 (TS) and 4 (CG) are not connected, do not turn the ignition switch off. If the ignition switch is turned off and then to ON again with no connection between terminals 12 (TS) and 4 (CG), the Test Mode DTCs are cleared.

   
   
   1. 

      Text in Illustration

      *a	Front view of DLC3

      Using SST, connect terminals 12 (TS), 13 (TC) and 4 (CG) of the DLC3.

      Note

      Do not connect the incorrect terminals as this will cause damage.

      SST

      09843-18040

   2. Count the number of blinks of the ABS warning light.

      Note

      
      

      • If only DTCs other than Test Mode (signal check) DTCs are output, repair the malfunctions and clear the DTCs.

      • If Test Mode (signal check) DTCs and other DTCs are output or if only Test Mode (signal check) DTCs are output, repair the malfunctions, clear the DTCs and Test Mode (signal check) DTCs, and perform the Test Mode (signal check) inspection again.

      Tech Tips

      
      

      • If more than 1 malfunction is detected at the same time, the lowest numbered code is output first.

      • Refer to List of Test Mode (Signal Check) DTC.

   3. Disconnect SST from terminals 12 (TS), 13 (TC) and 4 (CG) of the DLC3 and turn the ignition switch off.

   4. Turn the ignition switch to ON.

      Tech Tips

      The Test Mode DTCs are cleared by turning the ignition switch to ON again.

      Test Mode (Signal Check) DTC Memory Status Chart

      DLC3	Ignition Switch ON	Ignition Switch Off	Ignition Switch Off → Ignition Switch ON
      Terminals 12 (TS) and 4 (CG) connected	DTC memory maintained	DTC memory maintained	DTC memory maintained
      Terminals 12 (TS) and 4 (CG) not connected	DTC memory maintained	DTC memory maintained	DTC memory cleared

LIST OF TEST MODE (SIGNAL CHECK) DTC

• *: for 4WD